Filter



July3, 1945. Afc. KRAGKLAUER 2,379,582/

I FILTER Filed April 1. 1945 I /A/ VEN Toa ALG YJ/U: C. hie/4cm L Aufn HV1 H ...f5 4 ww Avkvnvnnvoo 000 o0 wa/oooooooo ooo oo .fxw v, a www 5 9 um M Z Cwf ww @Agg-m Patented July 3, 1945 FILTER Aloysius C. Kracklauer, Mundelein, Ill., assignor to Sparkler Manufacturing Company, Mundelein, `Ill., a copartnership composed of William J.' Kracklauer, Violet W. Kracklauer, and .himself Application April 1, 1943, serial No. 481,443

(ci. 21o- 183) Claims.

This invention pertains to a filter which may be used to advantagein a water system, for either household orindustrial use, or for the ltering of oil, or other fluids. More particularly, the present improvements relate to the cartridge or iilter unit which is removably positioned within a casing through which is circulated the liquid that is to undergo filtering treatment.

The present filter cartridge is in the form of an elongated bag or sack which is converged at both ends and then extended to provide necks which are tightly secured about a tubular core which is removably fitted over a iixedly mounted pipe extending centrally through the casing. With exhaustion ofv its useful life the lter cartridge may be easily removed from the casing to permit substitution of a fresh cartridge in its place. The construction of the cartridge is simple and inexpensive, but very effective for its intended purposes, all as will hereinafter be pointed out.

Asuggestive embodiment of my invention is set forth in the accompanying drawing, wherein- Figure 1 is a central longitudinal section through a filter cartridge containing therewithin a cartridge which embodies the present improvements;

Fig. 2 is a transverse section, 2-2 of Fig. 1;

On the inner side of the -cover is an axial socketed boss I9 internally screw-threaded to receive a bolt 21| whose head il affords a mounting of a, cap nut 3| fromwhich may be extended pins 32 forming a convenient operating means therefor. This cap, when fitted over the pipe end, and t taken on line Fig. 3 is a fragmentary detail in section of the lower end portion of the lter cartridge per se.

As shown, I employ a casing C wherein is an elongated cylindrical'chamber closed at the lower end by a fixed bottom 5 and at its upper end by around and over the cover 6. At a central point,.

substantially in coincidence with the axis of the casing, the bail is provided with an opening interiorly threaded for the reception of a bolt I5 at whose outer end is a head I6 fromwhich are extended pins I1 forming an operating handle. The

for a cover plate 22, foraminous or otherwise, thel purpose of which will hereafter appear. This plate may be secured removably in place vby the bolt 20 to be kept out of the way as a spare against the time of its being needed for active use. i

Extending downwardly from the casing battom is a boss 25 through which is an axial passageway' 26 which continues on into the casing within an upper extension 21 of the boss. At its lower end the boss is interiorlyV threaded at 28 to facilitate` connection with an outlet pipe, not shown, and

other interior threads 29 are formed in itsuppel? end region to afford a, mounting for an axial pipe 30 whose connecting end is exteriorly tlflreadedl whereby to be removably secured thereto. The upper pipe end which terminates proximate tothe cover is exteriorly threaded for reception thereon advanced thereupon, affords a, closure Afor the pipe end, and also cooperates in securing the lter car,l

tridge in place, as will presently be explained. i An inlet for the casing is also providedin an opening 33 extended through its bottom wall in an offcenter position thereupon. This opening is desir..

Aably interiorly threaded to facilitate connection therewith of an inlet, pipe, not shown.

The axial pipe 30 i's foraminous throughout its central region by the provision through its walls of numerous openings 35 which are desirably located at various points circumferentially thereof.

This pipe, which is supportedY only at its lower end, furnishes in conjunction with the upper end of the i boss 21 a mounting whereon maybe removably itted a hollow lter cartridge F whose construction may clearly be understood -by reference to Fig. 4. Here I have shown a core in the form of a central tube 36 of a diameter to freelyiit over the pipe 30 and be supportedthereby, when the cartridge is introduced Within the casing. This core which is relatively thin is foramin'ous vthroughout itscentral region as by theprovision of numerous small openings 31 extending inner end of the bolt which is desirably rounded f bears against a seat I3 formed on the outer side` i of the cover, When advanced, the bolt will press the cover tightly against the gasket-,ed seat to establish a seal therewith. By retracting the bolt,

through the tube at various circumferential places and for a length thereupon which is sub` stantially vcoincident with 'the foraminous area of the axial pipe 30. vTo each end of the tubular core is aflixed a. collar 40, connected thereto as by welding, and extending slightly beyond the proximate core end where an outturned flange 4I is formed.

The core furnishes a mounting for a multiple wrapping of-paper I5, such as filter paper whose ends lie adjacent the outturned flanges 4i so as to be confined and protected thereby. Fitted around the wrappings at each end is the neck 46 of an elongated fabric bag or sack 41 which, through most of its length, iso: a cylindrical contour with ends I8 converged inwardly and then extended outwardly to provide the necks already referred to. As by a flexible medium 49, such as a string, cord or wire, each end of the filter bag may be tied around its neck to connect tightly with the wrapping that surrounds the core, the bag being thereby held -iixedly in piace for the accommodation therewithin of a iilling which aflords a ltering medium, such, for exampie, as a suitable activated carbon compound.

After wrapping of the paper around the core for perhaps two or three convolutions, a spread ot some iniusorial or diatomaceous earth is laid thereon, and the paper is then wrapped around the core for another convolution or so to trap and hold the diatomaceous earth in place. Also, upon the bag fabric, while flat, I spread an activated carbon compound 50, the fabric being then wound around one or more times preliminary to drawing in of its ends for tying, as by a cord or wire,

around the collar-reinforced core to form thereout loose particles inasmuch as they are effectively and always confined in place therewithin. It the carbon compound be introduced as a slurry, it is than advantageous that the fabric be formed initially into a bag open at the top and tied at its lower end to the core; the slurry may then be poured in at the open end following which the bag is tied in place at that end.

In the construction shown (see Fig. l) the boss 21 supports at its inner end a circular plate 55,

secured iixediy to the. boss as by Welding, the plate .being united to an upstanding cylindrical wall 'd8 which surrounds the lter cartridge, desirably in spaced relation thereto. The plate 55 which may be foraminous or otherwise forms the bottom for a basket which is dened by the wall A 56 which is of fpraminous character.

In operation, the liquid entering through the inlet 32 passes upwardly within the casing chamber and gradually works its way laterally into the iilter cartridge. In this movement it is required to pass through the filtering medium, and finally through the wrappings of lter paper with infusorial or diatomaceous earth incorporated therewith. In its passage through the cartridge the fluid under treatment is relieved of its odors, tastes, color, impurities, etc., prior tov escape through the foraminous` core and axial pipe for downward descent therefrom and out through the passageway 26. The same course is followed, in the event that a prepared filter cartridge be not used, but a filling of waste, toweling, etc., be

placed within the basket. In either event, the

iluid under treatment must pass eventually through the llter paper windings loaded with infusoriai or dlatomaceous earth before escaping into the axial pipe by which itis conducted to the point of outlet. The lter unit itself comprises a multi-ply wrapping ci filter paper with interatrasos spersed earth forming in itself a composite filtering core. The outermost convolution of the wrapping is effectively secured by the ties applied to opposite ends of the surrounding bag. These bag ends which converge inwardly are drawn in to make a relatively stable pack of the contained ltering material, and because the bag ends are tightly secured escape oi' all filtering material from both the core wrappings and the bag exteriorly thereof is prevented. The filter unit is self-contained to the extent that it needs no external support from the surrounding basket which, as shown, may stand in spaced relation thereto. Filtering will accordingly take place a ilrst time through the composite core and then a second time through the pack to the exterior thereof. y

It is apparent that a filter of the kind under description may be used with various liquids, circulated at'wideiy ranging pressures, and that in operation the substitution of a. fresh filter cartridge for one that is exhausted can be performed simply and quickly, and with little or no interruption in the filtering process. The cartridge is not only effective for its intended purposesjbut is also very inexpensive to make, so

thatV after its period of usefulness has ended a discard thereof, rather than any attempted freshening. will prove most advantageous. However. if freshening is preferred, the bag will readily own up upon being disconnected from the core, and if the fabric be still in good condition it may again be used by spreading thereon a new supply of iilter material and then closing the bag once more after application to the core.

claim:

l. A filter cartridge having a core which com` y prises a formanicus tube, a lter paper wrapping extended through several closely wound convolutions around the tube, and a spread of diatomaceous earth between certain convolutions of the paper held entirely between opposed surfaces thereof, together` with a illling of carbon com-- pound arranged around the paper wrapping, an enclosure for the carbon compound in the form of a surrounding textile bag having its ends drawn whereby to maintain pressure between the several convolutions of the wrapping and between the wrapping and the foraminous tube intcriorly thereof to conne therein the spread of diotomaceous earth.

2. i lter cartridge in which is comprised an elongated cylindrical bag with indrawn ends terminating in outwardly extended necks, a core arranged axially within the bag and extended through the necks at opposite ends thereof, the core comprising a foraminous tube, a wrapping of iilter paper extending through several convolutions around the tube, and a spread of diatoxnaceous earth between certain oi the paper convolutions he1d entirely between opposed surfaces thereof, means tightly surrounding each neck to transmit pressure therefrom through the several paper convolutions to the tube interiorly thereof to provide a tight closure at the bag end and to confine between said convolutions the spread of diatomaceous earth, and a carbon compound filling confined in piace within the bag.

3. A iilter cartridge in which is comprised an elongated cylindrical bag closed at opposite ends and terminating in outstanding necks, a core arranged axially within the bag and extending outwardly through the necks threof, the core comprising a-foraminous tube, a wrapping of filter paper extending through several convolutlons around the tube, and a pairof collars closely surrounding the tube and disposed inwardly of the wrapping, one adjacent each end thereof, each collar having an outturned ilange extending past the proximate end of the Wrapping, a tie extending around each bag neck to transmit pressure therefrom through the several paper wrappings to the collar interiorly thereof to provide a tight closure at the bag end and to maintain the wrapping of illter paper in the form of a hollow core, each tie being located contiguous to and held against displacement axially of the core by the flange of one of the collars, and a fillingof filter material conned in place within the bag.

4. In a filter, the combination of an elongated casing having an inlet and an outlet, a foraminous pipe connected with the outlet and supported at one end within the casing to extend longitudinally thereof, and a filter cartridge within the casing, the cartridge comprising a hollow composite filtering core made up of multiple windings slidable over the pipe and laterally supported thereby, a filtering material surrounding the core, a bag converging at opposite ends to surround the filtering material and confining the same in the space therewithin, the bag when in-` y stalled within the casing remaining spaced from the elongated surrounding casing and the ends of the bag being extended outwardly, means for laterally drawing in and connecting opposite outwardly extending ends of the bag to the core multiple windings acting also to maintain the same inthe forni of a hollow core, meansy located beyond said drawing and connecting means for preventing displacement of the same axially of the core and means removably fitted to the pipe engageable with the core to secure the iilter cartridge immovably but releasably within the casing.

5. A filter in which isccmprised an elongated cylindrical casing closed at one end and open 'at the other, the closed end of the casing being provided with an integral hollow boss formingl an outlet opening and having an extension projecting into the casing, said casing being also provided with an inlet opening, a pipe connected to and supported by the" extension of said hollow .boss and extending axially within the casing, a

filter cartridge comprising a hollow composite filtering core, a ltering material surrounding the core, a textile covering surrounding the ltering material, means for laterally drawing in the textile fabric at opposite ends for tight connection tothe filtering core, whereby to unite the same for removable fitting over the axial pipe, the cartridge being supported laterally in a xed position solely by the pipe, means for securing the filter cartridge in operative position around the pipe, a basket immovably mounted within the casing on the extension of said hollow boss and having ioraminous cylindrical walls extending between the walls oi' the lter cartridge and casing in spaced relation to each and formed with one open end adjacent the open end of the casing, and va removable closure for the open end of the casing.

ALOYSIUS C. KRACKLAUER. 

